Sharks follow their noses home
![leopard shark](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/01/ticker_ht_leopardshark.jpg?fit=860%2C460&ssl=1)
Scientists have hypothesized that both birds and sharks might use smell to navigate. Tracking-tag data from leopard sharks provides the first evidence that the animals do use smell to find their way.
Kyle McBurnie (CC BY 2.0)